Stop-motion for velvet and like pile cutting machines.



H. NETHERWOOD. STOP MOTlON FOR VELVET AND LIKE PlLE CUTTING MACHINES.

APPLICATION FILED JUNE 1, 1916.

Patented Jan. 21, 1919.

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HARRY NETHERWOOD. 0F WARRINGTON, ENGLAND.

STOP-MOTION FOR VELVET AND LIKE PILE CUTTING- MACHINES.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Application filed June 1, 1916. Serial No. 101,115.

To all whom it may concern:

Be it known that I, HARRY Nn'rrrnnwoon, a subject of King George V of Great Britain, residing at Warrington, in the county of Lancaster, England, have invented a new and useful Improvement in Stop-Motions for Velvet and like Pile Cutting Machines, of which the following is a specification.

This invention relating to stop motions of velvet and like pile cutting machines such as set forth inv the specification of U. S. Patent No. 790577 and particularly to the improvements in such stop motions described and claimed in the specification of U. S. Patent N 0. 8764.62 has for its object the provision of improved means whereby the supplementary guide, shown and described in such last named specification, is dispensed with and the cutter with its guide and holder act alone for effecting the stoppage of the machine when the cutting knife enters the slip race or is otherwise defiected or caused to assume an abnormal position through excess of pressure of the fabric thereon during the cutting operation, or through other causes.

The improvements herein have no reference to knives of ordinary type which, with their guide portions, it has been proposed to secure to upwardly projecting lugs loosely mounted on supporting bars and adapted to be moved into engagement with contact members when the diversion of the knife causes it to be swung in either direction.

My invention will be described with reference to the accompanying drawing, in which Figure 1 is an elevation of a knife or cutter holder and parts constructed according to my invention;

Fig. 2 is a plan view of Fig. 1;

Fig. 3 is a section taken on'line AB, of Fig. 1 and Fig. 4 is a part elevation showing a modified construction of my improvements.

Referring to the drawing, and firstly to Figs. 1, 2 and 3, a represents the knife, I) the knife guide in which the knife is frictionally held and c the guide holder Which is, accordin to my invention, secured to the knife idediy soldering or like means. The guide older 0 has in this instance pivotally secured thereto a contact plate d. For this purpose the guide holder has an upwardly extending portion 0 to which. the lower portion of the contact plate at is pivotally secured by means of the screws c. The contact plate is suitably shaped at its lower end to form a shoulder cl, a lip or bent portion 03 extending rearwardly to act as a stop against the portion 0 of the guide holder. The contact plate (Z is adapted to engage with the contact maker of the ordinary stop motion and the knife and guide are carried by a spindle g which is capable of being readily applied to or removed from the tilting cutter holder h as ordinarily. Suitable insulating material is applied to insulate the parts where required.

The knife guide I) and guide holder 0 with the spindle g for pivoting same in the tilting cutter holder It thus form a single movab e part which can be easily handled and the guide and knife or cutter inserted in the race to be out. So long as the guide and knife or cutter run truly in the race, the upwardly extending projection or contact plate at remains in engagement with the contact maker 7 to maintain the electric circuit but should the knife or cutter be deflected from its course and enter the slip race or be forced by excessive pressure of the fabric into an abnormal position, the movement of said knife causes the guide also to move with it whereby the upwardly extending projection 03 is moved clear of the contact maker 7 thus breaking the circuit and bringing about the stoppage of the machine in the usual manner.

Instead of a separate contact plate at pivotally mounted to the upwardly extending portion 0 of the guide holder 0 we may construct the guide holder 0 and contact plate d in one piece, as shown at Fig. 4.

By the means described, I dispense with the supplementary guide and with the con-- tact pieces between the supplementary and ordinary guides hitherto employed and simplify the parts, this being of considerable advantage to the operator.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A device of the character described, comprising a guide-holder, a contact plate secured thereto and a second contact member in operative relation with said first contact plate.

2. A device of the character described, comprising a guide-holder, a knife-guide, a contact plate pivotally secured to said guide holder and a second contact member located above said first contact plate.

8. A device of the character described, comprising a guide-holder, a knife-guide, a contact plate pivotally secured to said guideholder and provided with a stop arranged to engage and disengage said guide-holder and a second contact member located above said first contact plate.

i. A device of the character described, comprising a guide-holder, a knife-guide secured thereto, a contact plate pivotally secured to said guide-holder and provided with a rearwardly extending lip arranged to engage and disengage said guide-holder and Copies of this patent may be obtained for five cents each,

a second contact member located above said first contact plate; c

5. An article of the character described, comprising a guide-holder having a central raised portion a knife-guide secured to said guide-holder, a contact-plate pivotally secured to said raised portion and provided With a shoulder" and lip arranged to engage and disengage said raised portion and a second contact member located above said contact plate.

In testimony whereof I aflix my signature in the presence of two Witnesses.

HARRY NETHERWOOD.

W'itnesses: 7 JOHN R. SU LAM, THOMAS H. BARRON.

by addressing the Commissioner of Yatents,

Washington, D. G. 

